Mi manca solo il tuo indirizzo.

Because mancare often works differently from English to miss.

In Italian, the thing that is missing is the grammatical subject, and the person affected is usually an indirect object.

So in:

Mi manca solo il tuo indirizzo

• mi = to me
• manca = is missing
• solo il tuo indirizzo = only your address

A very literal structure is:

To me, only your address is missing.

That is why Italian uses mi manca rather than io manco.

Here mi means to me.

It is an indirect object pronoun. It shows who lacks the thing.

Compare:

• Mi manca il documento = I’m missing the document / The document is missing for me
• Ti manca il documento = You’re missing the document
• Ci manca il documento = We’re missing the document

So mi does not mean I here. It means to me.

Because the subject is singular:

il tuo indirizzo

Since indirizzo is singular, the verb must also be singular:

• Mi manca il tuo indirizzo

If the missing thing were plural, the verb would be plural too:

• Mi mancano i tuoi documenti = I’m only missing your documents

So the verb agrees with the thing that is missing, not with the person in mi.

In Italian, possessives usually go together with a definite article:

• il mio libro
• la tua macchina
• i nostri amici

So il tuo indirizzo is the normal form.

A common exception is with many singular family terms:

• mia madre
• tuo fratello

But indirizzo is not a family term, so the article is normally required.

Solo means only, and here it limits what is still missing.

So the idea is:

The only thing missing is your address.

It tells us that everything else is already available; the address is the one remaining piece.

Italian often places solo right before the element it highlights:

• Mi manca solo il tuo indirizzo = only your address is missing

You could also hear other word orders for emphasis, such as:

• Solo il tuo indirizzo mi manca

But the original sentence is a very natural neutral way to say it.

Sometimes yes, but the structure is often reversed compared with English.

For example:

• Mi manchi = I miss you
• literally: You are missing to me

And in a sentence like your example:

• Mi manca il tuo indirizzo = I’m missing your address / Your address is lacking

So the meaning can match English miss, but the grammar often does not.

Also, do not confuse this with to lose something. If you mean I lost my address book, that would use another verb, such as perdere.

Yes, and it is very natural, but the nuance is slightly different.

• Mi manca solo il tuo indirizzo = The only thing I still don’t have is your address
• Mi serve solo il tuo indirizzo = I only need your address

They are close in meaning, but not identical:

• mancare focuses on what is still absent
• servire focuses on what is needed

In many real situations, either could work.

Yes, it is completely normal in Italian.

Italian is often more flexible than English with word order, especially with verbs like mancare.

The sentence is structured as:

• Mi = to me
• manca = is missing
• solo il tuo indirizzo = only your address

Putting the subject after the verb is very common in Italian, especially when introducing the thing that is lacking, needed, happening, and so on.

So even if it feels unusual from an English point of view, Mi manca solo il tuo indirizzo is a very natural Italian sentence.

Yes. Indirizzo usually means address, especially a postal or street address, but the exact meaning depends on context.

For example:

• indirizzo di casa = home address
• indirizzo email = email address

On its own, indirizzo most often suggests a physical address, but context can make it clear if another type of address is meant.

Yes. Solo and soltanto both mean only here.

So you could say:

• Mi manca solo il tuo indirizzo
• Mi manca soltanto il tuo indirizzo

Both are correct and natural. Soltanto can sound a little more formal or slightly more emphatic, but the meaning is the same.

Not wrong, but the meaning shifts slightly.

• Mi manca solo il tuo indirizzo = I’m only missing your address
• Manca solo il tuo indirizzo = Only your address is missing

Without mi, the sentence becomes more impersonal. It just states that the address is the missing item, without explicitly saying for me or from my set of information.

If you want to show whose missing item it is, mi is useful and natural.